THIRTY-EIGHTH ANNUAL CONVENTION 133 



two cases (Nos. 3 and 11) a number of pus clusters were found 

 on the lungs on Post Mortem examination. Bacteriological 

 examination revealed a number of strepticocci and animal inocu- 

 lation showed that the animal was not tubercular. Of the fifty- 

 two (52) animals slaughtered for tuberculosis, forty-one (41) 

 were found tubercular by the bacteriological examination, which 

 according to their form, size and acid fast, were pronounced 

 tubercle bacilli. 



In twenty (20) cases the microscopical, as well as the ani- 

 mal inoculations revealed tuberculosis, and in eight (8) cases* 

 the diagnosis could only be ascertained by animal inoculation. 

 The forty-one (41) animals by bacteriological method revealed 

 tuberculosis, as follows : Twenty-eight animals had lung tuber- 

 culosis, eleven had tuberculosis of the lung and other organs, 

 and two tuberculosis of lymphatic glands. 



From the information gathered by the bacteriological exam- 

 ination for lung tuberculosis we find the following cases (Nos. 

 12, 20, 27, 28, 31 and 39) to have deep seated cheesy degenerated 

 tissue; also that the disease had extended to the bifurcation of 

 the trachea and made it comparatively easy to secure material in 

 these cases. On the contrary the bacteriological examination 

 in cases (Nos. 30 and 34) showed no evidence of tubercle bacilli 

 but the post mortem revealed only a slightly -affected lymphatic 

 gland. No evidence of tuberculosis could be found in the lungs 

 or any other organ. It is interesting to note that these animals 

 had been standing with others affected with open tuberculosis. 

 The bacteriological examination failed to reveal serous tuber- 

 culosis, no matter how extensive. The claim that serous or 

 latent tuberculosis is not harmful to neighboring animals is sus- 

 tained by our investigations. If we summarize our results we 

 find that we are able to detect from seventy-eight to eighty-four 

 per cent of extensive lung tuberculosis by the method just 

 described. That not every case of lung tuberculosis could be 

 detected by this method can be traced to the fact that in most 

 cases the tubercle bacilli were incapsulated or existed in such 

 small numbers that they escaped bacteriological examination. 



